BIOLOGY HIGH SCHOOL

Which of the following organic compounds is the main source of energy for living things?a.carbohydratesc.nucleic acidsb.lipidsd.proteins

Answers

Answer 1
Answer: Well, carbohydrates burn and release energy. Nucleic acids give identity (like DNA, RNA). Lipids also give energy, but it's more difficult (they must be first turned into carbohydrates first). Proteins are building blocks for the cells.
Now, knowing all of this should make it easy to choose the correct answer :)
Answer 2
Answer:

Answer:

Carbohydrates

Explanation:

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Why do scientists think that the first true cells were probably anaerobic?

Answers

anaerobic because there was little oxygen; and 
heterotrophic because autotrophism (the ability to manufacture your own food) is a more complex process ... the first cells would have derived energy from surrounding organic molecules, which makes them heterotrophic.

Describe ways in which a healthy artery differs from an artery affected by coronary heart disease

Answers

Jajjajs kakia jakaioo isosois jskisisis iowowoso

"Over the years, the forest cover in a particular ecosystem was reduced from about 50% to 20%. What would be the MOST LIKELY effect of this?A) The loss of moisture from the soil would be reduced.
Eliminate
B) Herbivores would be forced to change into carnivores.
C) The flow of energy in the ecosystem would be affected.
D) The exchange of carbon dioxide in the ecosystem would increase"

Answers

The correct answer is option C

If the forest cover in an ecosystem is reduced from 50% to 20%. The most likely effect is that the flow of energy in the ecosystem would be affected.The forest means the green plants that are also known as the producers of the ecosystem and they transfer energy to the consumers and the ecological balance is maintained. If there will be less producers then the flow of energy in the ecosystem will be affected.

Answer:

c

Explanation:

c

What are the African cheetahs limiting factors?

Answers

Food; Space; Weather

Which class do honey bees belong?

Answers

the bug one or the yellow and black one

Which statement illustrates how human activities can most directly change the dynamic equilibrium of an ecosystem?Water pollution causes a decrease in fish populations in a river.
A hurricane causes a stream to overflow its banks.
Increased wind increases water evaporation from a plant.

Answers

The best answer would be the first statement. The first sentence which is 'water pollution causes a decrease in fish populations in a river.' illustrates how human activities can most directly change the dynamic equilibrium of an ecosystem.

Answer: Water pollution causes a decrease in fish populations in a river.

Explanation:

An ecosystem is a biotic community which includes abiotic (non-living) and biotic (living) components. The abiotic components includes water, sunlight, wind, soil and temperature whereas the biotic components includes the living beings such as plants, animals, microbes and other. The dynamic equilibrium of the ecosystem can be defined as the condition in which the abiotic factors of the ecosystem supports the life of the biotic factors without undergoing any drastic change which could negatively affect the population of living beings.

The river water is an abiotic factor which can be a habitat of large diversity of marine flora and fauna. The pollution of water could negative affect the population of the fish residing in the river. This will disturb the balance of ecosystem. As, in the ecosystem various species interact with one another to survive. Hence, the dynamic equilibrium will be changed.

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Which polymers carry the information for cell growth and reproduction from one generation to the next? A. proteins B. starches C. lipids D. nucleic acids